Title :
Anomalous recovery of the remanent polarization after heating polarized PVDF films up to 180°C
Author :
Eberle, G. ; Eisenmenger, W.
Author_Institution :
Phys. Inst., Stuttgart Univ., Germany
Abstract :
Biaxially stretched 38-μm-thick PVDF (polyvinylidene fluoride) samples with about 80% β content were poled at room temperature at E=200 MV/m for 5 s. The remanent polarization was measured with the PPS method first at 20°C, then after heating to 180°C, and a third time after cooling the sample to room temperature again, to determine its temperature-dependent stability. To distinguish between irreversible and reversible polarization loss due to heating of polarized PVDF films, the polarization was measured at elevated temperatures and after cooling down to room temperature again. The reversible polarization loss causes the pyroelectricity of PVDF
Keywords :
X-ray diffraction examination of materials; dielectric depolarisation; dielectric polarisation; heat treatment; polymer films; pyroelectricity; 180 C; 20 C; 38 micron; PPS method; X-ray diffraction; anomalous recovery; biaxially stretched samples; irreversible polarisation loss; polarized PVDF films; polyvinylidene fluoride; pyroelectricity; remanent polarization; reversible polarization loss; room temperature; temperature-dependent stability; thermal depolarisation; Collision mitigation; Cooling; Crystallization; Heat recovery; Heating; Lattices; Polarization; Polymer films; Pyroelectricity; Temperature;
Conference_Titel :
Electrical Insulation and Dielectric Phenomena, 1992. Annual Report. Conference on
Conference_Location :
Victoria, BC
Print_ISBN :
0-7803-0565-5
DOI :
10.1109/CEIDP.1992.283229
